Omron Programmable Terminals NT31 NT31C User Manual

Page 88

4-1

Section

Connecting to the RS-232C Port at the Host

Setting the Front Switches
Set the CPU DIP switch to 4 or 5 in accordance with the port NT31/NT31C is
connected to.

Peripheral port

This is used mainly for
connection to the
Programming Device.
(This also supports
connection of RS-232C
devices.)

RS-232 port

This is used mainly for
connection of RS-232C
devices.
(This also supports the
connection of
CX-Programmer.)

DIP switches (inside the battery storage)
• Set SW4 to ON (establishing communication in ac-

cordance with PC Setup) when connecting the
NT31/NT31C to the peripheral port.

• Set SW5 to OFF (establishing communication in ac-

cordance with PC Setup) when connecting the
NT31/NT31C to the RS-232C port.

SYSMAC CS1G

PROGRAMMABLE CONTROLLER

CPU4

OPEN

PERIPHERAL

PORT

BUSY

RUN

ERR/ALM

INH

PRPHL/COMM

MCPWR

Connecting to a CS1 Series Serial Communications Board
Serial Communications Board equipped with a RS-232C port for CS1-series
CPU Units: CS1W-SCB41/21

Reference: Serial Communications Boards and Serial Communications Units with lot num-

ber 991220 (12/20/99) and later support the high-speed 1:N NT Link. Boards and
Units with earlier lot numbers cannot be used.

CPU Allocation DM Area Settings
Setting is written from the Programming Device (a Programming Console or CX-
Programmer) directly into the allocation DM area (system setting area) of the
CPU. After the setting is written, it becomes effective by turning the power ON,
restarting the unit, restarting the communication port, or execution of the STUP
command.

In the following, the channel numbers of the allocation DM area and settings are
shown.

Allocation DM area (CH)

Writing

Settings

Port 1

Port 2

Writing

Value

Settings

DM32000

DM32010

8200

NT link (1:N) mode

DM32001

DM32011

000A

Communications baud rate (high-speed)

DM32006

DM32016

000

j = The largest model number of the

connected PT (0 – 7)

For example, when connecting PTs with model numbers 3, 4, 5, and 6 to port 1,
set the value 8200 Hex to DM32000, 000A Hex to DM32001, and 0006 Hex to
DM32006.

Connecting to a CS1 Series Serial Communication Unit
A CS1 series backplane mounted type : CS1W-SCU21

Reference: Serial Communications Boards and Serial Communications Units with lot num-

ber 991220 (12/20/99) and later support the high-speed 1:N NT Link. Boards and
Units with earlier lot numbers cannot be used.